Dark Reading is part of the Informa Tech Division of Informa PLC

This site is operated by a business or businesses owned by Informa PLC and all copyright resides with them.Informa PLC's registered office is 5 Howick Place, London SW1P 1WG. Registered in England and Wales. Number 8860726.

Risk

8/6/2008
09:27 PM
George V. Hulme
George V. Hulme
Commentary
50%
50%

Black Hat: DNS Researcher Flaw Much Bigger Than Thought

While it may be hard to fathom, considering the extraordinary amount of coverage and speculation that swirled about Dan Kaminsky's DNS vulnerability announcement, Kaminsky today said that the flaw is much more serious than previously speculated.

While it may be hard to fathom, considering the extraordinary amount of coverage and speculation that swirled about Dan Kaminsky's DNS vulnerability announcement, Kaminsky today said that the flaw is much more serious than previously speculated.As expected, Kaminsky, who is director of pen testing for security firm IOActive, today spoke to a room jam-packed with Black Hat goers. He explained that while most focused on cache poisoning attacks, the DNS vulnerability also could be used to attack VoIP, IPSec VPNs, SSL certs, automatic software update systems, and, quite surprisingly to me, anti-spam filters. Oh, yeah: this isn't a complete list, more like a starting point for the type of damage this vulnerability, if exploited, could usher in.

I found this Kaminsky quote to be quite cheerful: "There are many, many variants of this attack, and there are a ton of different paths that lead to doom." And if you thought that by moving your DNS behind your firewall brought you any safety, think again. His presentation pretty much proved that those firewall policies are of little use, and the flaw can be exploited through links, images, and advertisements in Web browsers, e-mail servers, and code inserted within documents that "call home."

The good news is that 120 million broadband consumers are now protected from the DNS vulnerability through their service providers that have applied the patch. "There has been a remarkable amount of uptake on this patch," Kaminsky said. "Home users at this point more likely than not are behind a protected environment, and they're actually probably going to be more unsafe at work."

While most home users are now protected because their ISP has probably deployed patches that fix the flaw, most of the Fortune 500, about 70%, he estimates, have applied the patch, with the remaining 30% either unpatched, or have patched but still have NAT woes.

So a great swathe of small and midsized business are probably still at significant risk.

Comment  | 
Print  | 
More Insights
Comments
Threaded  |  Newest First  |  Oldest First
COVID-19: Latest Security News & Commentary
Dark Reading Staff 9/17/2020
Cybersecurity Bounces Back, but Talent Still Absent
Simone Petrella, Chief Executive Officer, CyberVista,  9/16/2020
Meet the Computer Scientist Who Helped Push for Paper Ballots
Kelly Jackson Higgins, Executive Editor at Dark Reading,  9/16/2020
Register for Dark Reading Newsletters
White Papers
Video
Cartoon
Current Issue
Special Report: Computing's New Normal
This special report examines how IT security organizations have adapted to the "new normal" of computing and what the long-term effects will be. Read it and get a unique set of perspectives on issues ranging from new threats & vulnerabilities as a result of remote working to how enterprise security strategy will be affected long term.
Flash Poll
How IT Security Organizations are Attacking the Cybersecurity Problem
How IT Security Organizations are Attacking the Cybersecurity Problem
The COVID-19 pandemic turned the world -- and enterprise computing -- on end. Here's a look at how cybersecurity teams are retrenching their defense strategies, rebuilding their teams, and selecting new technologies to stop the oncoming rise of online attacks.
Twitter Feed
Dark Reading - Bug Report
Bug Report
Enterprise Vulnerabilities
From DHS/US-CERT's National Vulnerability Database
CVE-2020-25789
PUBLISHED: 2020-09-19
An issue was discovered in Tiny Tiny RSS (aka tt-rss) before 2020-09-16. The cached_url feature mishandles JavaScript inside an SVG document.
CVE-2020-25790
PUBLISHED: 2020-09-19
** DISPUTED ** Typesetter CMS 5.x through 5.1 allows admins to upload and execute arbitrary PHP code via a .php file inside a ZIP archive. NOTE: the vendor disputes the significance of this report because "admins are considered trustworthy"; however, the behavior "contradicts our secu...
CVE-2020-25791
PUBLISHED: 2020-09-19
An issue was discovered in the sized-chunks crate through 0.6.2 for Rust. In the Chunk implementation, the array size is not checked when constructed with unit().
CVE-2020-25792
PUBLISHED: 2020-09-19
An issue was discovered in the sized-chunks crate through 0.6.2 for Rust. In the Chunk implementation, the array size is not checked when constructed with pair().
CVE-2020-25793
PUBLISHED: 2020-09-19
An issue was discovered in the sized-chunks crate through 0.6.2 for Rust. In the Chunk implementation, the array size is not checked when constructed with From<InlineArray<A, T>>.